1 files changed, 50 insertions, 0 deletions
diff --git a/platform/indexing-api/src/com/intellij/psi/RefResolveService.java b/platform/indexing-api/src/com/intellij/psi/RefResolveService.java
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+++ b/platform/indexing-api/src/com/intellij/psi/RefResolveService.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2000-2014 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.psi;
+
+import com.intellij.openapi.components.AbstractProjectComponent;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.vfs.VirtualFileWithId;
+import com.intellij.psi.search.GlobalSearchScope;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collection;
+
+public abstract class RefResolveService extends AbstractProjectComponent {
+  public RefResolveService(Project project) {
+    super(project);
+  }
+
+  public static RefResolveService getInstance(Project project) {
+    return project.getComponent(RefResolveService.class);
+  }
+
+  @Nullable("null means the service has not resolved all files and is not ready yet")
+  public abstract int[] getBackwardIds(@NotNull VirtualFileWithId file);
+
+  /**
+   * @return subset of scope containing only files which reference the virtualFile
+   */
+  @NotNull
+  public abstract GlobalSearchScope restrictByBackwardIds(@NotNull VirtualFile virtualFile, @NotNull GlobalSearchScope scope);
+
+  /**
+   * @return add files to the resolve queue. until all files from there are resolved, the service is in incomplete state and returns null from getBackwardIds()
+   */
+  public abstract boolean queue(@NotNull Collection<VirtualFile> files, Object reason);
+}